Mold for making steel castings



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S. G N I T S www Km 1m D ENSu NN 8m Bm Ww F D L 0 M ,110. 406,181. Patented J111y 2,1889.

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W. E.. SNEDIKER.

- MoLD PoR MAKING STEEL CASTINGS.. No. 406,181.

Patented July 2, 1889.

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MLM

. UNITED STATES PATENT OFFICE.

NVILLIAM E. SNEDIKER, CF TRENTCN, NEV JERSEY.

MOLD FOR MAKING STEEL CASTINGS.

SPECIFICATION forming part of Letters PatentvNo. 406,181, dated July 2, 1889.

' Application tiled December 22, 1888. Serial No. 294,417. (No model.)

To all whom t may concern.-

Be it known that l, VILLIAM E. SNEDIKER, of Trenton, in thecounty of Mercer and State of New Jersey, have invented a certain new and useful Improvement in Molds for Making Steel Castings, of which t-he following is a specification.

I will describe in detail a mold for making steel castings embody ing my improvement, and then point out the novel features in the claim. y

In the accompanying drawings, Figures l and 2 are vertical sections, in planes at right angles to each other, of a mold embodying my improvement, the same being shown as adapted to cast hubs of bicycle-wheels. Fig. 3 is a horizontal section taken just below the plane of the dotted line ai, Fig. 2. Fig`- 4 is a vertical section of an ingot-mold embodying my improvement.

Similar letters of reference designate corresponding parts in all the figures.

Referring, first, to Figs. l, 2, and 3, whic represent a mold adapted for casting at one time two hubs for bicycle-,wh eels, A designates the hubs, each consisting of two heads or large end portions connected by a narrow neck, and which are liable to break through the neck when shrinking in cooling, if cast in a metal mold. As here shown, the mold has a central pouring-gate s, connected by branches s with the bottom of each mold-cavity for a hub A, and from the top thereof leads a gas and air vent s2.

The mold is divided centrally through its cavities at a, and the portions on each side of such division are designated by the letters B C, and are connected with each other bydowelpins b. The mold is also additionally divided horizontally at the line c, and each vertical half therefore consists of a lowerpart or seotion B or C, and an upper part or section B or'C, and the line. of horizontal division c will usually be below the center of height of the casting A, as here shown. and upper parts B C B C are connected by dowel-pins b, so that they may rise and fall, the upper relatively to the lower sections, and between them are introduced wedges or distance-pieces D, on which the upper section B C of the mold rests preparatory to pouring.

The lower The lower section B C of the mold is mounted on a base piece E, and the part B may be securely bolted thereto by screws e., while the part C may slide thereon, and be moved toward and from the part B by a screw c', fitting a bearing e2 in the base piece E, and a nut e3 in a lug projecting downward from the part C through the base-piece, as shown in Fig. 2.

The wedges or distance pieces D are operated by levers D', fulcrumed at d', and to these leversmay be applied an iron band or other connect-ion d2 for holding the wedges in place.

When pouring is to be done, the parts of the mold are all of them brought to the positions shown in the drawings, so as to close the mold, and the upper section B C is supported onl the lower section B C through wedges or distance-pieces D, and the molten metal is poured to fill the cavities and gates. Immediately thereafter, and before t-he molten metal in the body of the casting has set, the levers D are operated to withdraw the wedges or distance-pieces D, and the weight of the upper and larger section of the mold B C is transferred from the lower section B C to the casting, and is left suspended on the casting A, which is not yet wholly solid. The weight of the upper part of the mold on the casting while the body of the casting is in a molten state subject-s it to compression, and not only makes it more dense and with less liability of porosity, but permits it to shrink freely, and allows the upper part of the mold to descend as shrinkage occurs, and prevents any fracture in the casting.

Fig. 4t the mold is intended for a steel ingot, and is made, as before described, of part-s or sections B C B C', it being divided vertically and horizontally on the lines a c, and has wedges or distance-pieces D between its upperand lower parts. As here shown, the two upright halves of the mold are held together by the wedges or distance-pieces D are operated by levers D fulcrumed at d to the lower parts of the mold.

Ordinarily in castfesteel ingots there is av long cavity or depression in the top of theinclamps F, and rest upon the base-piece E, and

In the example of my invention shown in IOC got, which is called piping, and which practically renders useless nearly or quite onefifth the length of the ingot. In casting an ingot according to xny invention the parts are all brought to the position shown in Fig. 4, and after pouring and before the body of metal has become solid, the wedges or distance-pieces D are pulled, and the Weight of the larger upper part of the mold B C all rests upon the solidifying metal, and produces a compressing action on the ingot, which acts in the saine direction as the sl1rinkage, and avoids the formation of the very deep core or pipe in the top of the inold. The wedges D are held in place solely by resting between the upper and lower parts of the mold, and are otherwise unconnected to ther mold; consequently the wedges can be instantly withdrawn by the levers D as soon as pouring is inished and before the shrinkage of the casting can take place.

That I clai 1n as iny invention, and desire to secure by Letters Patent, is

In a mold, the combination, with an upper divided port-ion, of a lower divided portion made separate from the upper divided portion, distance-pieces interposed between said upper and lower portions, and upon which the upper portion rests, and levers fulcrulned upon one of said portions and connected to the said distance-pieees, which levers maybe operated to withdraw the distance-pieces from between said upper and lower port-ions of the lnold, substantially as specified.

VVILLIAM E. SNEDIKER. XVitnesses:

EDWIN RoBr. WALKER, G. V. PAcKnRs. 

